4333 W. Sam Houston Pkwy N., Suite 100 Houston, TX 77043 | D: +1 713 300-2700 | TF: 800 619-2861 | F: +1 713 856-6623

Pilot™ Probe for LNG

The Pilot™ probe for LNG has been developed for in situ process analyses of cryogenic liquids.  The modular design of the Pilot probe allows the sampling point to be customized for each customer’s process and site requirements.  Analyzing LNG as a cryogenic liquid eliminates the errors and maintenance associated with sampling systems such as vaporizers, which are typically required with traditional process analyzers.

The Pilot probes can be supplied, marked, and certified to the ATEX directive or North American hazard area safety requirements. The combination of the Pilot probe for LNG and the Kaiser Optograf™ analyzer yields a powerful Process Analytical tool for in situ composition analysis of LNG and mixed refrigerants using quantitative Raman spectral analysis.  

All Pilot probes utilize a single fiber for excitation and another for collection. This design provides a robust interface and reduced cost for long runs of fiber in the process environment.  The use of a single collection fiber enables the Optograf analyzer to simultaneously measure up to 4 streams, greatly reducing the total analysis time when compared to traditional analysis systems which employ sequential measurement techniques.

The standard fiber cable length is 15 meters, with a maximum standard cable runs up to 250 meters.  Longer fiber runs can be considered on a custom basis.

  • Probe Constructed to Individual Site Requirements
  • Sealed Probe Design
  • Integrated “Laser On” Indicator
  • One In / One Out Fiber Optics
  • Flange (ANSI / DIN) or Compression Mount Options
  • Cable Enclosure (Conduit-ready)
Pilot Raman Probes for Process Control
Laser Wavelength:
532nm Standard
Sample Interface:
Temperature: Window, at Tip: -196 to 150°C
At probe head:  -196 to 150°C
At Cable: up to 80°C
Thermal Shock: Can Withstand 0 –100°C
pH Range: -1 to 15
Relative Humidity: Up to 95%, Non-condensing
Pressure Range: Up to 3000 PSI at tip*
*As built, probe range may be limited by flange or other process interface.
Standard Probe Lengths: Up to 15 ft. (4.6 m) — diameter dependent
Probe Diameter: 1" Pipe (1.3" actual),
2" Pipe (2.37" actual)
Flange Mount (option): Up to 12" Diameter (ANSI & DIN)
Flange Type: Blind ANSI B 16.5 or
Blank DIN 2527
Materials of Construction:
Body Material: 316 Stainless Steel
Window Material: High-purity Sapphire
Window Seal: Compression Bonded
Cable Enclosure Material: Anodized Aluminum
ATEX:  II 2/1 G Ex ia op is IIA or IIB or IIB+H2 or IIC T3 or T4 or T6 Ga
North American
Hazard Area:
Ex ia IIC T4
Class I Zone 0 AEx ia IIC T4
Class I Division 1 Groups A, B, C, and D T4